Cooling apparatus.



H. KOPPERS.

COOLING APPARATUS.

APPLIOATION FILED JULY a, 1013.

Patented June 9, 1914.

j 'UNITED srArns PATENT oFFIcE.

HEINRICH Korrnns, oF nssnNbN-THE-RUHB, GERMANY, AssIGNoR To H. Yizorrnma COMPANY, or CHICAGO, ILLINOIS, A CORPORATION.

COOLING APPARATUS.

Specification of Letters Patent.

Patented June 9, 1914.

Appncaun 'md rudy s, 191s. serial No. 777,829.

,'l'o all whom it m ay concern Be it known that I, HEINRICH Koreans, engineer, residing at Moltkestrasse Q9, Essen-on-the-Ruhr, in Prussia, Germany, have invented certain new and useful Improvements in Codling Apparatus, ot' which the following is a specification.

ln connection with coolers comprising outer tubes surrounding an inner tube or tubes, it has been proposed to connect one end or ,both ends of the inner tubes to the casing ofthe cooler by means of stuiingboxes in such a manner as to allow of movement ot' the tubes under expansion. The stuiling--boxes heretofore employed have the disadvantage that in course of time, wear or deterioration of the packing material enables the cooling liquid on one side, which is generally under higher pressure, toleak into the material which is to be cooled. It is also difficult to determine when there is a leak with the result| that the liquid in process of cooling is spoiled. Thus, for instance, in the cooling ot' benzol washing oil leakage will produce an emulsion which renders the oil unfit for further use. These disadvantages are obviated by the present invention, according to which a ring is placed between the pliable packing rings so as to divide the stuffing-box packing into two parts, one of which makes a tight joint against thematerial to be cooled, and the other makes a tight joint against the cooling liquid, the said intermediate ring having radial holes or ducts which allow any liquid which may have leaked past one packing to escape outward. 'lhis arrangement enables the cooler to be readily tested for leakage and excludes all possibility o the cooling water reaching the substance to be cooled, since liquid escaping from one part of the stuffing-box is ow- ,of opposite ends ot' the apparatus; Figs. 4

and 5 `comprise two detail views, drawn to a larger scale.

The outer tubes f are expanded in the walls of chamber-ed casings a and of which casing n is provided with holes c and gl for the admission and` outlet of the cooling water, while both casings are furnished with baffle walls or partitions g which cause the cooling water to take a sinuous path. The .inner tubes L are expanded at both ends in tube plates z' and if, the platea' being pressed against the casing a by the caps Z. flhe tubeplates /mhave a sliding fit in bores 1n the casing L, and dished cover plates m, Iestablish communication between adjacent sets or groups Aof inner tubes. This arrangement provides a sinuous path for the llquid to be cooled circulating through the mner tubes, and enables the two liquids to be caused to circulate in the same or in opposite directions.

Interposed between the Casing b andthe covers m, is a packing device comprising two packing rings a and o with an intermediate metal ring p. The latter is provided with 'adial bores g which communicate with the dividing space between the casing Z1 and the cover m. It will be seen that the inner tubes are still able to expand freely toward the outei` casing without setting up stresses and while avoiding the drawbacks hereinbefore mentioned. Any liquid leaking out between the tube plate 7c and packings n and o will escape outward through the bores f] in the ring p, and thereby immediately indicate leakage. Hence, after a cooler has been cleaned out (this being frequently neeessary) any escape of oil`and water will denote leakage at one of the joints. In any case, there is no possibility ot' leakage past the stufling-box from one side to the other. It will of course sullice to provide the described joint at one end of the tubes only. although it may be arranged at both ends il desirable.

I claimm A cooler comprisingl a pair of chambered apertured casings, an outer tube connecting said casings and expanded in the inner walls thereof, a irst aperturcd ap secured to the outer wall of one of said casings, a firsttube plate firmly clamped between said iirst cap and outer casing-wall, a second apertured cap secured to the outer wall of the other casing and spaced therefrom, a second tube plate slidably mounted in the apertures ot said second cap and last named outer casing wall, inner tubes .loosely inclosed by the outer tube and expanded in both of said y, tube plates, an interiorly zgdooved ring fitted InA Witness whereof I have my on' the second tube plate intermediate' the name to this specification in the presence of second cap and the opposed outer casingtwo subscribing Witnesses.

Wall, said ring being provided with radial HEINRICH KOPPERS. 5 bores that connect the groove with the at- Witnesses: v

mosphere, and ha packing ring located on HENRY HASPER,

each side of the interiorly grooved ring. WOLDEMAR HAUPT. 

